The sentinel pins the set's shape, outranking the newest-published-section
inference (#182 D2); malformed content is a red diagnosis naming the file.
bin/changelog-assemble skips 'shape' in the stray-file loop so the sentinel
survives the consumption (#182 D5).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Stamp 2 is one assembler-produced edit; changelog-armed's rule is stated
mode-first (fragment, then legacy, #112 D7/D8/D9); changelog-assembled
gets its operator section (#116); monotonic records D10; the two rewritten
error strings and the retired re-arm recovery follow (#117).
lib/changelog.sh gains changelog_fragments (publication order: trailing
issue number descending, filename tie-break), changelog_fragment_problem
(the release-time rules moved onto the PR that writes the fragment, #112
D9), and changelog_assemble (canonical group order per D5, one shape per
repo per D4). bin/changelog-assemble folds changelog.d/ into one release
section, deletes exactly what it consumed, and --check proves the body
without touching the tree.
Part of #112. Closes#114 groundwork; tests follow.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
